* Add helper function for reading in JSONL
* Add rule-based NER component
* Fix whitespace
* Add component to factories
* Add tests
* Add option to disable indent on json_dumps compat
Otherwise, reading JSONL back in line by line won't work
* Fix error code
Allows adding those components to the pipeline out-of-the-box if they're defined in a model's meta.json. Also allows usage as nlp.add_pipe(nlp.create_pipe('merge_entities')).